Backup Is a Validation Control: Architectures for Hardened GxP Equipment
Hardened PLCs, chromatographs, and cleanroom controllers can't take backup agents, inbound traffic, or OS patches — yet auditors expect documented, tested recovery of the exact validated state. The architectures that work, the controls that make a restore defensible, and why 'we have backups' is not an answer.
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Saram Consulting